Switch control



April23,.1929. s. H. RowLAND SWITCH CONTROL Filed May 14, 1927 0 5 2 M l www 7 j 1 @Fifi S 2 wmwmlm @www v.. uw ff vk Z mm www@ Fatented 22555, 1929.

-I. ROWLAND, OF BATH, MAINE.

SW'TCH COTROL.

Application filed May 14,

rllhis invention relates Vto innnoveinents in switch controls, particularly relating 'to the controls adapted for use with motors and other electrical devices. t

An object of this invention is to provide a protection for switch contact eieine'nts against the destructive effects of the electrical arcs formed d in; repeated starting, stepping and reversi if; operations.

n. further object this invention is to provide a switch control having,l a two-way or double throxvv 'prick vmalte and brealr switch action, in wl h, by moving a handle 1n .either direction, the switch blades will inction to complete full'contacts ith a quick sna'ipingl motion, and on restorin the handle tothe lirst position, the contacts open with suiiicient 'stance the arc.

@ther objects of this invention will appear from the detailed description of the device and as disclosed in the single sheet of drawings herewith made a part of the application.

In the drawings# u F ie'ure 1 illustrates a longitudinal and cross sectional view of the switch control disclosing` the differenteleiueuts in assembled relationship.

Figure 2 represents a cross sectionall view of a coupling, taken along line Q of Figure 1. b

Figure 3 discloses a diagrammatic view of a rotary switch having connections to the lines and the control coils of a vmotor from a panel. t

Figure t illustrates a diagrammatic view of a four pole reverse rotary switch l'iavine; connections to the armature of motors.

Fig. 5 illustrates a sectional view ldisclos ing the center notch and friction sprin fea ture. n

In the switch control, according' to this invention, a turningr shaft or stein .1 is provided havinga suitable handle portion i2 keyed or: otherwise fastened thereto as at 3. The stem 1 is adapted to loe mounted within a suitable switch housing,` comprising preferably head and rear cap portions et and 5 and 'casing element 6 made of material common to switch control housing. Stop pins 7 and 8 are fastened to the stem element 1 in such a manner that when the handle element E2 is turned to the left, the stop pin Z will function to bring tension to bear against the free end 9 of the switch centralizinn; springv 10, thereby turning` the pin 8 vaway from the free end of 1927. Serial No. 191,344.

the spring- 11. At the same time, pins 12 and 13 attached to a sleeve element 14, adapted to revolve freely on the stem or shaft portion 1, are moved away from and in Contact with the stop pins 7 and 8; that is, on turning the handle 2 to the left, as above noted, the stop pin 7 functions to wind up the end 9 of the centralizing,` spring,` 10, 9 and 10, the f ye end of the spring 10 being turned away from the pin 12 attached to the sleeve, and at the same time will function to turn stop pin 8 away from the spring end 11, while a trip arm portion 15, also suitably keyed or tached to the shaft 1 and adapted to coopere with a coupling portion 16, moves against a stop lug 17 extending from the coupling 16. in this operation or movement, the spring;` end 11 has been held by the pin 13 which is attached to the sleeve portion 14. This sleeve element is mounted to turn freely on the shaft or stein 1, and is connected prefcrably integrally to the coupling portion 16 by means of an arm extension 18. In order to 'jive thtI coupling portion 1G a suitable retarding action, friction elements 19, such as springs, are provided for retarding the portion 16 until the trip arm 15 engages the stop element 17 on the coupling` 16, thereby allowing it to inove past the center notch of the friction springs 19, at which time the stored up energy or pressure in the switch centralizing spring 9, 10 and 11 against the pin 13, sleeve 1li, arm portion 18, coupling` 16, and a shaft 20, is released, and rapidly turns the required number of degrees according,` to the location of the handle', stop and switch blade contacts.

The friction springs 19 may be omitted where dummy contacts are available, as shown in switch diagrams, an d should be, when used, of suliicient tension to retard the action until the strip arm engages the couplingstop whenever the switch is thrown for either contact.

rllhe inner end of the shaft or stem element 1 is adapted to be rotatably mounted in the coupling portion 16, while the inner end of the shaft 20 is adapted to be securely keyed to the coupling` 1G.

1n turning` the handle 2 to the left, as above noted, a handle centralizing spring- 21, 22, and 23 is wound up for a full travel of the handle Q a. follows: shaft 1, frame or drum portion Q4, and pins 25 and 26 turn to 'the left, pin 2G turns the spring end 23 away from the holdl s ai.

L itt ing pin 27 weich is attached to the casino' or housing element (i. Pin nieves away iroin the spring end 2l leaving' it reid by pin m which is also attached to the hoi; 6. During' the above mov; i

contacts were made as :Sib-eue ai i in tl until the handle is released, when the spr' end 23 turns the pins 2G, Ytraine Z-, shat l and handle 2 to tl e center. ln the m intime, the lett switch contacts are broken a i lows Shatt'l. functions to turn pins i and S to the right, the pin 8 tending to wind up snriug end llv of the switch centralizing spring 10, and moves 'the end ll away from the piu lil, The spring end .9 holding on pin 12 until the trip arm l5 engages the stoo 2) oit the couhlinf; 1G, thereb turnn' shaft 'f= L f moving,r switch blzn'ies out ot element 1 8, thc co y switch blades. n. oescrin" switch handle 'from the te .ter "he right wouldfbe a repetition el: the above, which covers the function ot the claimen when the switch isthrown troni lett to ce 'lo throw the switch romrigght to center would entail the saine action as tl'.n'il.iee in 'ow from center to left.

In operation, this invention provides a switch control having means tor obtaining a t\\'oway or double threw quick maize a nd break switch action. The ordinary ipe oit switch control, evcn tllougih provided with a single centralizingspring ou the handle, is dependenton constantly expert mani pnlation by the operator. It has been Afound that in practice the operator unconsciously allows his pressure to relax suihcicnthv to .inst brealf.. fontacts and hold the arc, or injog'ginn' or in short duration vot operation, the contacts are neither closed nor open sufficiently, resulting' in heating, burningr and failing contacts. To obviate these ditliculties, this invention provides a: means whereby, on moving the switch handle in either direction, the switch blades w'll 'function toinakea full Contact with a quick snapping motion, and on restoring the handle tocenter, the contacts open with sutiicient speed to out-distance the arc. This result is accomplished in the main by ln'oviding two separate moving' members, one attached to the handle, and the other to the switch and connected by a centralizing spring through a sleeve loosely mounted on the handle shaft and a coupling' on the shatt, a trip arm loosely mounted inside ot the coupling' and rigiuly connected to the handle shaft to actuate the coupling' in either direction a tter energy has been stored in the centralizing spring. In ad dition, a second centralizing spring is providedto be wound up on the motion ot the handle in either direction.

In the construction of this switch control, the particular form and type ot centinlizing springs, pins and switches may be oi" any dcsirable material. I `urther1nore, substitutions and alterations may be made in the disclosure oi. the drawings and in the specification within the scope ot the claims without attccting the merits oi' this invention.

The stop pins or lug elements may be et any suitable type, either integrally itin'med from the stein, housinl)l or sleeve portions or otherwise.

lllhat l claim is:-

l.. In a ,f-avitch control, means for obtaining a two-way or' double throw quick make and break switch action, comprising a hous` ing, a rotatable Stem element mounted therein, a sleeve portion mounted loosely on the stein, a ccntraliziwr spring n.'indahly mounted on the sleeve, stop elements suitably fixed to the stem and sleeve for contacting with the ends of the spring in such a manner that the spring may be wound on the rotation ot Vthe stein in cithe'.' direction, a trip arm lixed 'to lhe stem, conjiling member formed inte- Irally with the sleeve portion, the Ainner end et the stem element being rotatably mounted herein, stop elements extendingl from thc oupling` member for cooperating with the trip arm and a shaft elei'nent rotatably mounted in the housing and iixed at one end in the coupling.

In a switch control, means tor obtaining a. two-wayin' double throw quick make and break switch action, comprising ahousing, a rotatable stein clement mounted therein, a sleeve portion mounted loosely on the stein, a centralizing,T spring:r windabl mountedon the sleeve, stop elements suita ly fixed to the stem and sleeve 'tor contacting with the ends of the spring;r in such a manner thatthe spring may be wound on the-rotation of thc'steln in either direction, a trip arm tixed to the stem,

coupling member formed integrally with the sleeve portion, the inner end of the Stem clement being` rotatably mounted therein, stop elements extending from the coupling member for cooperating with the'trip arm and a shaft elementl rotatably mounted in-the housing and fixed at one end in the coupling, means icr retarding action untilthe-t-rip'arm engages the stop elements on the coupling, consistingr of friction rtwilient elements suitably positioned in relatie ship to the housing and coupling. l'

3. Ina switch control, means for obtaining a two-way or double throw quick make and brezil: switch action, comprisingr a housing, rotatable stem element mounted therein, a sleeve portion mounted loosely on the stem, a oentralizing spring windably mounted on the sleeve, stop elements suitably fixed to the stem and sleeve for contacting with the ends ot the spring in such a manner that the spring may be wound on the rotation 0f the stem in either direction, a trip arm lixed to the stem, a coupling member formed integrally With the sleeve portion, the inner end of the stem element being` rotatably mounted therein, stop elements extending Atrom the coupling member for cooperating With the trip arm and a shaft element rotatably mounted in the housing and lixed at one end in the coupling, means for returning the rotatable stem element to center or neutral position consisting of an auxiliary sleeve element within the housing, a secondary centralizing spring loosely mounted thereon, stop pins attached vto the housing and auxiliary sleeve portion 'for the purpose oit engaging the ends ot the secondary spring.

4. A switch'control comprising tivo separate movable members, handle or stem element, one of the members being attached to the handle or stem element, the other member attached to the switch and centralizing connection, a sleeve loosely n'iounted on the stem, a neutralizing spring` being` mounted thereon, a coupling element integrally located iv i th the sleeve, a trip arm loosely mounted in cooperation With the coupling and rigidly eonnected to the stem, thereby providing means 'for actuating the coupling in either direction after energy has been stored in the centralizing spring.

5. A switch control comprising two separate movable members, a handle or stein clef ment, one of the members being attached to the handle or stem element, the other member attached to the switch and centralizing connection, a sleeve loosely mounted on the stem, a centralizing spring being mounted thereon, a coupling element integrally connected with the sleeve, a trip arm loosely mounted in Cooperation With the coupling and rigidly connected to the stem, thereby vin'oviding means :for actuating the coupling in either direction after energy has been stored in the centralizing spring, a second centralizing spring loosely mounted on the member attached to the stem for returning the stem to central or neutral position.

G, A switch control comprising a plurality of movable members, a stem element, one member being attached to the switch connection, a sleeve loosely mounted on the stem, a centralizin spring mounted on the sleeve, the sleeve having a coupling member integrally connected therewith, means for actuating the coupling in either direction after energy has been stored in the centralizing spring consisting ol a trip arm loosely mounted in cooperation with the coupling and rigidly connccted to the stem and means for holding the actuated member against rotation until released.

lu testin'iony whereof I a/llix my signature.

SYLVESTER H. ROVLAND. 

